[Bug 99671] [v4.10] GPU HANG: ecode 6:0:0xbd69ffff, in compiz [2609], reason: Ring hung, action: reset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99671

--- Comment #28 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to Josh Holland from comment #25)
> And another hang. This one I got dmesg and GPU dump from; it seemed more
> like the hangs I was getting on the Ubuntu 4.4 kernels (where everything
> apart from the cursor freezes for a minute, but then starts working fine
> again), rather than the 4.10 ones I've been building, where the entire UI
> (including cursor) freezes and doesn't seem to recover. Presumably your
> commit fixed something...

Yup, we are right back to the original pattern of hangs. But now I know it
passed internal sanity checks before doing so. Puzzling. 

I need to think about how this could even arise, in the meantime could you
please try running with i915.semaphores=0 on the kernel command line and see if
that makes a difference?

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